This Engineering Note studies the design of the Dry Air Purge that is going to flow through the Warm Tube of the End Calorimeter of the D-O Calorimeter. The Tev tubes through the E.C. can be thought of as a cluster of concentric tubes: The Tev tube, the warm (vacuum vessel) tube, 15 layers of superinsulation, the cold (argon vessel) tube, and the Inner Hadronic center support tube. The Dry Air Purge will involve flowing Dry Air through the annular region between the Warm Tube and the Tev Beam Pipe. This air flow is intended to prevent condensation from forming in this region which could turn to ice under cryogenic temperatures. Any ice formed in this gap, could cause serious problems when these tubes are moved. The Air will flow through a Nylon Tube Fitting -1/4-inch I.D. to 1/8-inch male pipe thread (Cole Palmer YB-06465-15) see Drawing MC-295221 (Appendix A). This fitting will be attached to the Nylon 2-inch Tube-Wiper and Seal Assembly which is clamped to the ends of the Warm Tube (Appendix A). This note includes drawings and calculations that explain the setup of the Dry Air Purge and give the required information on the pressure drops through …

WSRC-RP-91-677 studied the structural response of the safety rods under the conditions of brake failure and accidental release. It was concluded that the maximum impact loading to the safety rod is 6020 pounds based on conservative considerations that energy dissipation attributable to fluid resistance and reactor superstructure flexibility. The staffers of the Defense Nuclear Facility Safety Board reviewed the results and inquired about the extent of conservatism. By request of the RESTART team, I reassessed the impact force due to these conservative assumptions. This memorandum reports these assessments.

WSRC-RP-91-677 studied the structural response of the safety rods under the conditions of brake failure and accidental release. It was concluded that the maximum impact loading to the safety rod is 6020 pounds based on conservative considerations that energy dissipation attributable to fluid resistance and reactor superstructure flexibility. The staffers of the Defense Nuclear Facility Safety Board reviewed the results and inquired about the extent of conservatism. By request of the RESTART team, I reassessed the impact force due to these conservative assumptions. This memorandum reports these assessments.

This note examines b-jet tagging at SDC, using semileptonic b {r arrow} e{upsilon} X electron decays. The main application for this tagging capability would be in the study of Top decays. Thus, we consider Top decays in a reasonable'' mass range (e.g. 110 < Mtop < 170). For completeness, we also consider inclusive QCD production of b-quarks. We are mainly interested in the effects of hadron calorimeter segmentation on the electron efficiency, assuming that similar algorithms are used for electron ID at SDC as at CDF. We review the following topics: kinematics of top decay; kinematics of semileptonic b-decay; effects of Had/EM cuts on electron ID, as a function of b-decay kinematics and calorimeter segmentation; overall efficiency for b-tagging from Top decay and inclusive b-production. We consider only the barrel region in our simulation, e.g. {eta} < 1.4. 19 figs.

It is shown that if the effects of nucleon binding on deep inelastic scattering are considered within many-body realistic descriptions of nuclei which include nucleon-nucleon correlations, the EMC effect in light and medium weight nuclei and nuclear matter can be accounted for in the region 0.2 {le} x {le} 0.5, but a systematic discrepancy between theory and experiment remains to be explained for 0.5 {le} x {le} 0.9.

It is shown that if the effects of nucleon binding on deep inelastic scattering are considered within many-body realistic descriptions of nuclei which include nucleon-nucleon correlations, the EMC effect in light and medium weight nuclei and nuclear matter can be accounted for in the region 0.2 {le} x {le} 0.5, but a systematic discrepancy between theory and experiment remains to be explained for 0.5 {le} x {le} 0.9.

This report summarizes an interview conducted with Dr. David S. Grummon, a specialist in ion beam assisted deposition (IBAD) and coatings at Michigan State University, to define the concept and components of an ion beam assisted deposition (IBAD) system; summarizes findings of a literature search conducted to identify prior and current efforts in developing lubricious coatings; and reports on the market potential for Argonne`s IBAD lubricious coating process.

This report summarizes an interview conducted with Dr. David S. Grummon, a specialist in ion beam assisted deposition (IBAD) and coatings at Michigan State University, to define the concept and components of an ion beam assisted deposition (IBAD) system; summarizes findings of a literature search conducted to identify prior and current efforts in developing lubricious coatings; and reports on the market potential for Argonne's IBAD lubricious coating process.

The traveler received a United Nations Development Program (UNDP) Award for Distinguished Scientists to visit Indian Research Institutions including Central Drug Research Institute (CDRI), Lucknow, the host institution, in cooperation with the Council of Scientific and Industrial Research (CSIR) of India. At CDRI, the traveler had meetings to discuss progress and future directions of on-going collaborative research work on nucleosides and had the opportunity to initiate new projects with the divisions of pharmacology, biopolymers, and membrane biology. As a part of this program, the traveler also visited Sanjay Gandhi Post Graduate Institute (SGPI) of Medical Sciences, Lucknow; Board of Radiation and Isotope Technology (BRIT) and Bhabha Atomic Research Center (BARC), Bombay; Variable Energy Cyclotron Center (VECC) and Indian Institute of Chemical Biology, Calcutta. He also attended the Indo-American Society of Nuclear Medicine Meeting held in Calcutta. The traveler delivered five seminars describing various aspects of radiopharmaceutical development at the Oak Ridge National Laboratory (ORNL) and discussed the opportunities for exchange visits to ORNL by Indian scientists.

The ODH problem in this case involves the instrument air line to the clean room. which is isolated by a check valve from the gaseous nitrogen trailer backup source (valve CV787I, see DRG. NO. 3740.510-MA-273995, attached (the 'to purging enclosure' line nms to the clean room)). Normally, the check valve prevents backflow through the instrument air line. But as we all know, valves can fail. The estimated mean failure rate for a check valve to allow reverse flow is 3 {center_dot} 10{sup -7}. Failure of the instrument air and the check valve would allow the seepage ofgaseous nitrogen into the clean room. The failure of the instrument air is necessary to cause an ODH problem, due to the fact that the air pressure would keep the lower pressured gaseous nitrogen from flowing through the check valve. The compressor for the instrument air is fairly reliable, but to show the true nature of how safe this situation is, both cases that follow will assume that the compressor, and therefore the instrument air, has already failed. Table A shows the standard ODH situation. Assuming everything is working correctly (all the gasses are flowing, the ventilation is active, etc.), the only consideration is …

Several sets of gas pressure measurements were fielded on the LEDOUX event to evaluate the experiment room pressure history and the horizontal pressure gradient in the alluvium due to the detonation. The pressure measurements in the zero room and diagnostic drift consisted of fluid filled high pressure tubing running from each of these areas up to pressure transducer packages in their respective cable holes. The pressure gradient in the alluvium was sensed at several locations adjacent to the main drift and at a gravel filled section of the drift stemming. Fluid filled high pressure tubes were also used in this set to transmit the pressure from the sensing location to a transducer package located between the end of drift stemming and the U1-a shaft. The measurements resulted in limited success. Two very useful data records were obtained in the pressure gradient measurements adjacent to the main drift. The two remaining measurements in that set yielded no data: one suffered an electronic failure in the data transmission system, and the other sensed no pressure increase. The measurement of the diagnostic drift pressure history showed that the pressure transmission tubes were either closed off by backflow restrictor valves (containment features) or the …

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The objective of this program is to develop an improved catalyst and process for the conversion of synthesis gas to isobutylene. The research will identify and optimize the key catalyst and process characteristics that give improved performance for CO conversion by a non-Fischer-Tropsch process.

The objective of this program is to develop an improved catalyst and process for the conversion of synthesis gas to isobutylene. The research will identify and optimize the key catalyst and process characteristics that give improved performance for CO conversion by a non-Fischer-Tropsch process.

We have used a flexible geometry model of a calorimeter design for SDC to study the effect of passive material in front of the calorimeter and between the barrel and endcap modules on the apparent response to hadrons. The thicknesses of the passive materials have been chosen to closely resemble the currently projected wall thicknesses of the scintillating tile-fiber and liquid-argon calorimeter designs. The liquid-argon model contains about three times the amount of material in its shells compared to the tile-fiber model. The solenoid coil reduces the relative difference somewhat in the barrel region but constitutes only a minor correction in the transition region from barrel to endcap. Correspondingly, we find a significantly worse response for the liquid-argon case which we demonstrate using beams of single {pi}{sup minus} particles of 10 GeV/c momentum. 13 refs., 6 figs.

The objective of this project is to evaluate and demonstrate a cost effective emission control technology for acid rain precursors, oxides of nitrogen (NO{sub x}) and sulfur (SO{sub x}), on two coal fired utility boilers in Illinois. The units selected are representative of pre-NSPS design practices: tangential and cyclone fired. Work on a third unit, wall fired, has been stopped because of funding limitations. The specific objectives are to demonstrate reductions of 60 percent in NO{sub x} and 50 percent in SO{sub x} emissions, by a combination of two developed technologies, gas reburning (GR) and sorbent injection (SI).

Clean Coal Technology (CCT) implies the use of coal in an environmentally acceptable manner. Coal combustion results in the emission of oxides of nitrogen (NO{sub x}), which are precursors of both acid rain and ozone formation. The primary objective of this CCT project is to evaluate the use of Gas Reburning and Low NO{sub x} Burners (GR-LNB) for NO{sub x} emission control from a wall fired boiler. It is anticipated that, if the demonstration is successful, the GR-LNB technology could become commercialized during the 1990's and will be capable of (1) achieving significant reduction in the emissions of nitrogen oxides and sulfur dioxide (another acid rain precursor) from existing facilities to minimize environmental impacts such as transboundary and interstate pollution and/or (2) providing for future energy needs in an environmentally acceptable manner.

The fluidized-bed copper oxide process was developed to simultaneously remove sulfur dioxide and nitrogen oxide contaminants from the flue gas of coal-fired utility boilers. This dry and regenerable process uses a copper oxide sorbent in a fluidized-bed reactor. Contaminants are removed without generating waste material. (VC)

The fluidized-bed copper oxide process was developed to simultaneously remove sulfur dioxide and nitrogen oxide contaminants from the flue gas of coal-fired utility boilers. This dry and regenerable process uses a copper oxide sorbent in a fluidized-bed reactor. Contaminants are removed without generating waste material. (VC)

This project revolves around understanding the fundamental processes involved in the catalytic removal of harmful oxygenated organics present in coal liquids. We are modelling the complex type of sulfided Mo catalyst proposed for these reactions with simple single crystal surfaces. These display a controlled range and number of reaction sites and can be extensively characterized by surface science techniques. We then investigate the reaction pathways for representative simple oxygenates upon these surfaces. Our previous work has shown that an important component of furan reactions on sulfided Mo surfaces are dehydrogenation reactions of adsorbed hydrocarbon fragments. The desorption of hydrogen occurs in several steps and is strongly influenced by the amounts of sulfur and carbon on the surface. In order to understand this complex behavior during this period we have performed a complete series of adsorption/desorption experiments for hydrogen (deuterium) on Mo(110) that has been prepared with varying amounts of carbon and sulfur on the surface. Hydrogen adsorption is blocked by preadsorbed sulfur with a dramatic weakening of the strength with which hydrogen is bound to the surface. Hydrogen adsorption is totally blocked by 0.5 ML of preadsorbed sulfur. 4 refs., 9 figs.

SSC detectors represent a challenging departure, both in size and precision, from currently operating detectors. In this note we enumerate some of the benefits of using high magnetic fields both to simplify the detector and improve its resolution and sensitivity. We have chosen an arrangement optimized to search for the reaction H{sup 0} {yields} {gamma}{gamma}. The arrangement also has the excellent momentum resolution for muons and electrons considered critical for the discovery of such processes as H{sup 0} {yields} Z{sup 0}Z{sup 0} {yields} {ell}{sup +}{ell}{sup {minus}}{ell}{sup +}{ell}{sup {minus}}, H{sup 0} {yields} Z{sup 0}Z{sup 0} {yields} {ell}{sup +}{ell}{sup {minus}}{ell}{sup +}{ell}{sup {minus}}, new and narrow vector bosons, and bound states of extra generational quarks. This detection scheme represents an improvement in the H{sup 0} {yields} {gamma}{gamma} mass resolution of at least a factor of 7 beyond the best currently proposed detectors. In addition, we have a significantly improved rejection of common H{sup 0} {yields} {gamma}{gamma} backgrounds. As indeed most experiments do not exceed their initial projections, this extra factor could insure the unambiguous discovery of this decay should it indeed occur. As no reasonably realistic detector can achieve excellent detection for all physics signatures we chose to give tip on excellent hadron …

Both travelers were members of a nine-person US delegation that participated in an international workshop on accelerator-based 14 MeV neutron sources for fusion materials research hosted by the University of Tokyo. Presentations made at the workshop reviewed the technology developed by the FMIT Project, advances in accelerator technology, and proposed concepts for neutron sources. One traveler then participated in the initial meeting of the IEA Working Group on High Energy, High Flux Neutron Sources in which efforts were begun to evaluate and compare proposed neutron sources; the Fourth FFTF/MOTA Experimenters' Workshop which covered planning and coordination of the US-Japan collaboration using the FFTF reactor to irradiate fusion reactor materials; and held discussions with several JAERI personnel on the US-Japan collaboration on fusion reactor materials.

In the following section a brief review of constitutive models is presented along with the implications of using them in creep crack growth studies under variable loads. The model searched for this study, is discussed along with is special features that make is particularly suitable for this investigation. This model is based on the creep hardening surface and is particularly useful for variable and fully reversed load histories. In Section 3 an implicit finite element algorithm for this model is derived. Details regarding implementation of this method into FVP and existing FE program to study creep crack growth, are also discussed. The results of the algorithm are verified against closed form solutions for simple geometries in Section 4. Sources of error and differences between using explicit and implicit schemes are also presented. Section 5 compares the numerical results with experimental data for the case of combined tension and torsion and fully reversed load histories. Section 6 provides results of some of the constant load creep crack growth analyses that have been performed to date. Because a wealth of experimental data has been developed for creep crack under constant load conditions, the need to develop our own creep growth data for …

In the following section a brief review of constitutive models is presented along with the implications of using them in creep crack growth studies under variable loads. The model searched for this study, is discussed along with is special features that make is particularly suitable for this investigation. This model is based on the creep hardening surface and is particularly useful for variable and fully reversed load histories. In Section 3 an implicit finite element algorithm for this model is derived. Details regarding implementation of this method into FVP and existing FE program to study creep crack growth, are also discussed. The results of the algorithm are verified against closed form solutions for simple geometries in Section 4. Sources of error and differences between using explicit and implicit schemes are also presented. Section 5 compares the numerical results with experimental data for the case of combined tension and torsion and fully reversed load histories. Section 6 provides results of some of the constant load creep crack growth analyses that have been performed to date. Because a wealth of experimental data has been developed for creep crack under constant load conditions, the need to develop our own creep growth data for …